package org.example.controller;

import lombok.extern.slf4j.Slf4j;
import org.example.common.R;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

@Slf4j
@RestController
@RequestMapping("/common")
public class CommonController {
    @Value("${reggie.path}")
    private String basePath;
    @PostMapping("/upload")
    public R<String> upload(MultipartFile file){
            String originalFileName=file.getOriginalFilename();
            String suffix=originalFileName.substring(originalFileName.lastIndexOf("."));
            String fileName= UUID.randomUUID().toString()+suffix;
            File dir=new File(basePath);
            if (!dir.exists()){
                dir.mkdirs();
            }
            try {
            file.transferTo(new File(basePath+fileName));
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        return R.success(fileName);
    }
    @GetMapping("/download")
    public void download(String name,HttpServletResponse response){
        try {
            FileInputStream fileInputStream=new FileInputStream(new File(basePath+name));
            ServletOutputStream outputStream=response.getOutputStream();

            response.setContentType("image/jpeg");
            int len=0;
            byte[] bytes=new byte[1024];
            while((len=fileInputStream.read(bytes))!=-1){
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }
              outputStream.close();
            fileInputStream.close();
        } catch (FileNotFoundException e) {
            throw new RuntimeException(e);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }


    }
}
